ill make it inwr and delete the coolers then
If that's the issue, why not replace the TUNG with something that doesn't get hot when sparked? INWR, NTCT and PTCT are all pretty heat-resistant (though none as much as TUNG), are not heated by SPRK, and the last two will passively self-cool if they DO somehow get too hot.
The coolers are mainly for the tungsten which the output cable is made out of
It would be a lot more compact if it didn't have the coolers, which are unnecessary because PSCN and NSCN naturally cool to (IIRC) around 30C each time they get sparked.